An operation detection device for a key operation of a keyboard device includes a conductive unit configured to be disposed on each of keys, a substrate configured to be disposed facing each of the keys in a pressing direction of the keys. The substrate is provided with a sensor including at least first and second coils, the sensor being configured to be disposed spaced from one key so that at least one of the first or second coil outputs a signal corresponding to a distance between the one key and the respective sensor. The operation detection device includes a detection unit configured to detect a displacement of the one key in at least one of a yaw direction or a roll direction based on signals output from the first and second coils during a key pressing stroke of the one key.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The operation detection device according to claim 1, wherein the detection unit is configured to detect a stroke position of the one key based on the signal output from at least one of the first or second coils.
5. The operation detection device according to claim 1, wherein the first and second coils are configured to be disposed along a key arrangement direction of the plurality of keys.
8. The operation detection device according to claim 1, wherein the first and second coils are configured to be arranged along a longitudinal direction of the one key.
9. The operation detection device according to claim 8, wherein the first coil is configured to be disposed shifted in a first direction along a key arrangement direction of the plurality of keys, and the second coil is configured to be disposed shifted in a second direction, opposite to the first direction, along the key arrangement direction.
13. The operation detection device according to claim 1, wherein the conductive unit comprises a metal plate configured to be substantially parallel to a surface of the one key.
17. The operation detection method according to claim 16, further comprising detecting a stroke position of the corresponding key based on the signal output from the at least one of the first or second coil.
18. The operation detection method according to claim 16, wherein the detecting of the displacement detects the displacement of the one key in the yaw direction or the roll direction based on a difference between the signals output from the first and second coils.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
May 11, 2022
May 23, 2023
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.